On Wed, Jan 5, 2011 at 8:23 PM, Jean-Yves Avenard <jyavenard at gmail.com> wrote: > Can the HD-PVR do AAC passthrough ? My HD-PVR gives me (from my DirecTV HD receiver via optical audio): AC3 - when the source is 5.1 AAC - when the source is stereo Both play back fine for me in MythTV. Dunno if that helps or now.